Grouting machine



March 31 1953 H. F. zAGRAY ET AL 2633340 GROUTING MACHINE Filed May 11, 195o 2 SHEETS-SHEET 2 I I I I0 E l/ 16/ I I I -I y I N a@ ATTORNEYS Patented Mar. 31,P 1953 2,633,340 GROUTING MACHINE Harold F. Zagray, Canton', and Floyd W. Wack, Louisville, Ohio, assignors to Precision Building System, Ohio Inc., Canton, Ohio, a corporation of Application vMay 11,1950, serial No. 161,394

4 Claims. l

The invention relates to grouting machines and more'particularly to a machine including a reservoir having an agitator therein and a pump for pumping grouting material from the reservoir through a exible hose having a nozzle thereon.

The type of grouting machine to which the invention pertains is designed for handling a thin Igrouting material, having small diameter aggregate therein, for applying the grouting to a Ymasonry wall built up of blocks having vertical and horizontal passages therein for receiving the grouting material.

It is an object of the invention to provide a grouting machine comprising a reservoir, pump and prime mover, in the form of a motor or engine, assembled as a unit so that the machine may be easily transported and moved adjacent to a wall during the building thereof.

Another object is t provide a grouting machine of the type referred to including a screwtype pump for pumping thin grouting material from the reservoir through a flexible hose.

A further object is to provide a grouting machine of this character'having a valve controlling the hose nozzle and a return line extending from the nozzle to the reservoir, so that when the nozzle valve is closed grouting material will be returned to the reservoir to prevent hardening of the grouting material within the hose.

A still further object is to provide such a grouting machine having an agitator Within the reservoir for continuously agitating and mixing the grouting vmaterial during the operation of the machine so that the grouting material pumped through the hose will be of uniform consistency. Another object is to provide a grouting machine of the character referred to'having a clutch between the prime mover and the pump, whereby the agitator maybe operated to mix groutingiin the reservoir without Vcirculating the grouting through the pump and hose.

A further objectisnto provide such a grouting machine having a T-connection between the reservoir and the pump for connecting a water line for iiushing out the pump and flexible hose,

The above objects together with others which will be apparent from the drawings and following description, or which may be later referred to, may be attained by constructing the improved grouting machine in the manner hereinafter described in detail and illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of a grouting machine embodying the invention, with parts broken away for the purpose of illustration;

Fig.' 2 an end elevation of the -improved grouting machine with parts broken away; and

Fig. 3 an enlarged, longitudinal, sectional view through the screw-type pump.

The grouting machine comprises generally a mixing tank or reservoir, indicated generally at Ill, a pump indicated generally at vII for pumping grouting material from the tank and discharging it from a hose line, and a prime mover indicated generally at I2, which may be any suitable type of engine or motor for driving the pump and agitating means inthe mixing tank.

These parts are preferably assembled as a unit upon a frame comprising a base formed of the longitudinal angle irons I3 connected bythe cross members I4 and I5 which support the pump and motor respectively. Uprights I6, which may also be in the form of angle irons, support the mixing tank I above the pump and motor.

The tank I preferably has a rounded bottom, as-indicated at I 1, and concentric therewithis journalled a shaft I8, in suitable bearings I9 provided in the end walls 20 of the tank. This 'shaft carries an agitator in the form of a plurality of spiral blades 2| connected to the shaftv by the radial arms 22 which may be formed upon or 'rigidly connected to hub portions 23 fixed to cpposite end portions of the shaft as by the pins 24.

For the purpose of continuously rotating this agitator, a pulley 25, of relatively large diameter, is fixed upon one end of the shaft I8 and connected, as by the belt 26, with a smaller pulley 2l fixed upon the shaft 28 of the motor or engine I2. Y

y The pump, indicated generally at I I, comprises a rhousing 29 having an inlet chamber 30 at one vend andan outlet chamber 3i at the 'other end.

Between the inlet 'and outlet chambers is 1ocated the stator 32 having a helical passage 33 and within which is rotatably mounted the helical or screw rotor 34, the shaft 35 ofwhich is Vjournalled through a suitable packing gland 36 in one end of the pump house and adapted to be operatively connected to the adjacent endv of the motor shaft 28 through the clutch 28a, which may be any conventional type of clutch.

An inlet pipe or hose 31 is connected at one end to the outlet neck 33 in the bottom of the mixing tank and the other end thereof is connected to the inlet chamber 30 of the pump, as indicated at 39 in Fig. 1.

A flexible hose 4I) is connected as at 4I to the outlet chamber of the pump. This hose may be of any desirable length and is provided at its outer end with a nozzle 42 having a cut-oil` valve 43 thereon of any suitable construction, whereby the discharge of grouting material therefrom may be manually controlled.

For the purpose of preventing the grouting material from hardening in the hose 40, when the valve 43 is closed, a return hose line 44 communi- Cates with the hose 40 adjacent to the nozzle and extends into the mixing tank l so that the valve 43 may be operated to intermittently cut oli the discharge of grouting material from the nozzle without the necessity of stopping the engine or motor which drives the pump.

Thus, with the nozzle valve closed and the pump operating, grouting material will be continuously pumped from the mixing tank to the hose 40 and back through the return hose 44 to the mixing tank whereby the grouting material will remain at proper consistency and the machine is at all times ready for operation by merely opening the valve 43.

For the purpose of providing means for flushing the hose 31, the interior of the pump and the flexible hose 40, with water, to thoroughly clean these parts after grouting has stood therein for any length of time, a T-connection 45 may be interposed between the outlet neck 38 of the tank or reservoir and the hose 31 leading to the inlet side of the pump.

The branch 46 of this T-connection may be provided with means, such as the screw threads 41, for attaching a water line 48 thereto. In order to close the outlet from thetank or reservoir lll, during the time the pump and flexible hose are being flushed With water, a valve 49 may be provided.

When the grouting machine is normally operated, to mix grouting in the tank or reservoir and discharge it through the pump and flexible hose 4B, the branch 46 of the T-connection may be closed by a valve 59, so that grouting material from the tank will pass to the pump and then be discharged through the ilexible hose 40.

It should be understood that when the hose and pump are being flushed with water, the return hose line 44 is removed from the tank so as not to discharge the water into the tank. By opening the nozzle valve 43, during the flushing operation, the water may be discharged through the nozzle to clean the same.

If desired any suitable type of valve, as indicatedat l, may be provided to control, or cut 0E, the flow of liquids from the hose 49 to the return hose 44.

This grouting machine may be placed upon a truck or the like and conveyed along the side of a wall during the building operation and quickly and easily moved from one point to another in order to pump grouting material into the passages formed within the wall as above referred to.

We claim:

1. A grouting machine comprising a mixing tank, an agitator in the mixing tank, a pump having an inlet and an outlet, means connecting the mixing tank to the inlet of the pump, a flexible hose connected to the outlet of the pump, a nozzle upon the hose, a shut-oli valve on the nozzle and a return hose connected to said flexible hose immediately adjacent to the nozzle and communicating with the mixing tank, and a prime mover operatively connected to the agitator and to the pump.

2. A grouting machine comprising a mixing tank, an agitator in the mixing tank, a screw pump having an inlet and an outlet, means connecting the mixing tank to the inlet of the pump, a flexiblehose connected to the outlet of the pump, a nozzle upon the hose, a shut-off valve on the nozzle and a return hose connected to said flexible hose immediately adjacent to the nozzle and communicating with the mixing tank, and a prime mover operatively connected to the agitator and to the pump.

3. A grouting machine comprising a mixing tank, an agitator in the mixing tank, .a pump having an inlet and an outlet, means connecting the mixing tank to the inlet of the pump, a flexible hose connected to the outlet of the pump, a.

' nozzle upon the hose, a shut-off valve on the nozzle and a return hose connected to said flexible hose immediately adjacent to the nozzle and communicating with the mixing tank, a valve between the return hose and the flexible hose, and a prime mover operatively connected to the agitator and to the pump. 4. A grouting machine comprising a mixing tank, an agitator in the-mixing tank, a screw pump having an inlet and an outlet, means connecting the mixing tank to the inlet or" the pump, a iiexible hose connected to the outlet of the pump, a nozzle upon the hose, a shut-off valve on the nozzle and a return hose connected to said flexible hose immediately adjacent to the nozzle and communicating with the mixing tank, a valve between the return hose and the ilexible hose, and a prime mover operatively connected to the agitator and to the pump.

HAROLD F. ZAGRAY. FLOYD W. WACK.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Norway Oct. 26, 1931 

